Hello Wen,
could you please clarify whether your WRF run used the 24 category or 28 category USGS scheme? Using the standard 24 category USGS scheme should not create any issues in CMAQ, but based on the discussions in this thread, using the newer 28 category USGS scheme may cause issues.
Using the USGS24, MODIS, or NLCD40 (NLCD40 over the US, blended with MODIS for non-US portions of North America) land use schemes should all work.
Using the Pleim-Xiu LSM in WRF is encouraged but not strictly required when using WRF as input to CMAQ. One exception are CMAQ simulations enabling the inline windblown dust emissions option. Such simulations should use the Pleim-Xiu LSM since other LSM calculate soil properties at depths that are not consistent with assumptions in the CMAQ windblown dust module.